Horizontal drilling and boring machine



(No Model.) 3 Sheets-Sheet 1.

W. B. PEARSON. HORIZONTAL DRILLING AND BORING MACHINE.

No. 593,491. Patented Nov. 9,1897.

llllllllllllllllllllllllll illillllllllllllih, IIIIIIIIIIIIIII' 8 lllllllllll! (No Model.) 3 Sheets-Sheet 2.

W. B. PEARSON. HQRIZONTAL DRILLING AND BORING MAGHINB.

Patented Nov. 9, 1897.

w. B. PEARSON. HORIZONTAL DRILLING AND BORING MACHINE. No. 593,491.

3 Sheets-Sheet 3.

(No Model.)

Patented Nov. 9,1897.

UNITE STATES PATENT OFFIcn,

WALTER B. PEARSON, OF CHICAGO, ILLINOIS.

HORIZONTAL DRILLING AND BORING MACHINE.-

SPECIFICATION forming part of Letters Patent No. 593,491, dated November 9, 1897.

I Application filed December 29,1896. Serial No. 617,371. (No model.)

To all whom it may concern.-

Be it known that I, WALTER B. PEARSON, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Horizontal Drilling and Boring Machines, of which the following is a specification.

My invention relates to improvements in horizontal drilling andboring machines, and relates particularly to certain novel features in the construction of the bed and column of the machine, in the means for supporting and operating the table thereof,and to an improved thrust-bearing for the feed mechanism.

Machines of this kind are particularly designed and adapted for heavy duty, and are consequently made very large and heavy.

As heretofore constructed, the column of the machine has been either cast integral with the bed or has been bolted to a thin rearward extension thereof. The first construction is objectionable on account of the large size and great weight of these parts, which renders them difficult to h'andleand increases the cost thereof. The second construction is also objectionable and for the reason that by reducing the thickness of the bed it is rendered Weak and is consequently liable to springand buckle when resting upon an uneven surface or support, thereby throwing the machine out of true. As it relates to this feature, the object of the invention is to provide a machine in which the column and bed are made separate from each other and the bed of which will possess desired strength and stiffness.

To this end my invention consists in making the bed of such thickness throughout its entire length as will insure desired strength and stiffness to the machine and in securing a separate column to a lateral extension of said bed, the end of the bed being inclosed 4 by said column, the front of which is cut away to receive said bed.

As heretofore constructed also the table of the machine has been made integral with slow and difficult operation, involving much work and corresponding expense. As it relates to this feature, the object of my invention is to provide a table which may be 'trued up relatively to the spindle of the machine independently of the vertical slide; and to this end the invention consists in making the table separate from the slide and in articulating one end thereof to said slide in any suitable manner, so that-said table will be pivotally movable relatively to said slide, and in so supporting said table that the ends thereof may be adjusted vertically independently of each other, and that when said table has been thus adjusted in proper position relatively to the spindle of the machine it may be raised or lowered bodily without impairing its alinement.

In the preferable construction shown the table is secured to the slide by means of a horizontal pivot-pin, and the ends thereof rest upon upright screws, the lower ends of which are threaded through nuts secured in the bed of said machine. To provide for truing up the table, one or both of said nuts are movable in the bed, and to provide for raising and lowering said table bodily bevel-gears are secured to said screws, which engage other bevel-gears secured to a shaft supported in suitable bearings in the table.

A further object of my invention is to provideimprovedmeans for supporting the outer or free end of the table in adjusted position and for supporting the out-er end of a boringbar, whereby said machine is adapted to a a wider range of work than machines of the same size as now constructed. I-Ieretofore the free end of the table and the end of the boring-bar have been supported by means of a single standard, which rests upon the bed of the machine and which comprises two upright arms, the sides of which embrace the sides of the table and the tops-of which are connected by a suitable cap, which extends over and across said table. Slots are formed in the upright arms, through which pass binding-screws, the heads of which are secured in T-grooves formed in the sides of the table and to the ends of which, projecting through the slots in said upright arms, are threaded clamping-nuts, and a bearing for the outer end of a boring-bar is formed I and is located beyond the outer end of the table, thus leaving the table entirely free and unobstructed.

A further object of my invention is to provide an improved support for the thrustbearing of the feed attachment of machines of this kind. Heretofore the bearing for the feed attachment has been formed on a bracket secured to the column of the machine. This construction is objectionable for the reasons, among others, that fitting the bracket to the column involves expense and is weak relatively to the amount of metal used. As it relates to this feature, my invention consists in forming the thrust-bearing for the feed attachment on a rearward extension of the head-stock, which comprises a web or flange on each side thereof so disposed that the thrust of the feed mechanism will subject the same to a direct tensile strain only. The advantages of this construction, as compared with that heretofore used, are that the cost of fitting and attaching a bracket to the column are eliminated and the great relative strength and absolute stifiness and freedom from all spring. A further advantage of my improved construction is that the bearing for the feed attachment may be bored at the same time with the spindle-bearings of the head-stock, thereby insuring absolute accuracy and considerably cheapening that operation.

The invention also consists of the various other features, combinations of features, and details of construction hereinafter described and then pointed out in the claims.

In the accompanying drawings aboring and drilling machine embodying my invention is fully illustrated.

Figure 1 is a side elevation of a horizontal drilling and boring machine embodying my invention. Fig. 2 is a Vertical longitudinal sectional View thereof. Fig. 3 is an end view thereof. Fig. 4 is a plan section of the table on the line 4 4 of Fig. 1. Figs. 5, 6, 7, and S are details showing the manner of securing the nuts of the adj usting-screws to the bed; and Fig. 9 is a sectional View of the rearward extension of the head-stock on the line 9 9 of Fig. 2.

The following description of my improved drilling and boring machine is limited to a' detailed description of the novel features thereof, as those features shown and not so described are old and well known in the art and will be readily and fully understood by persons familiar with such machines from an inspection of the drawings.

Referring now to the drawings, A designates the bed of the machine, and A the column thereof. In a machine of my improved construction the bed and column are made separate from each other. The bed A is made of such depth or thickness throughout its entire length as will give desired strength and stiffness to the machine and will insure that the bed will not spring or buckle out of true when resting upon an irregular surface or support. As shown, the bed is made of substantially uniform depth throughout its entire length. The column Arests upon and is rigidly secured to a lateral extension A formed around the end of the bed'A, the end of the bed being inclosed by the column, a suitable opening a being formed in the front side or wall of said column to receive the bed.

The table B of the machine is made separate from the vertical slide 13 and one end of said table is articulated to said slide. In the preferable construction shown the table B is connected to the slide B by means of a pin 13 which has suitable bearings formed in both said slide and table and which is made sufficiently large to insure necessary strength and rigidity of the machine.

The table B rests uponupright screws 13 B, located beneath the same, one adjacent to each end thereof. The upper ends of said screws are secured so as to rotate freely in suitable bearings formed in the under side of the table 13, and the lower ends thereof are threaded to nuts B B secured in the bed of the machine. The screws 13 B are of the same pitch, and secured thereto are bevelgears 17 b, which mesh with gears U W, secured to a shaft B which extends longitudinally of the table B and is revoluble in suitable bearings therein. The end of the shaft B projects at the front end of said table and is squared to receive a wrench or a crank. Rotation of said shaft B will obviously operate to raise or lower the table B and to maintain it always parallel with its initial position. In the preferable construction shown the screws 13 B project above their bearings in the table 13, and the gears 19 b are secured to said projecting upper ends of the screws, and openings b are formed in the top of the table above said gearing. The openings 12 are closed by means of removable caps b Said openings 5 render the gearing readily accessible both in assembling and in repairing the same, and the caps b prevent chips and dirt from falling into said gearing.

As a further improvement in machines of this kind I provide a shaft B at the pivoted end of the table, a bevel-gear b on which meshes with the bevel-gear b on the shaft B The end of the shaft B projects beyond the side of the table and is squared in the same manner as is the end of the shaft 13 In order that the gear 12 shall clear the gear I), it is made to contain fewer teeth than the gear b As a result of this construction the shaft B will project from the side of the table at an angle thereto. A desired relation of parts is as follows: pitch of the gear 19 five, (5;) number of teeth, twenty, pitch of the gear 11 five, (5;) number of teeth, sixteen, (16,) or four less than in the gear 6 With these proportions it so happens that the shaft 13 projects in such position that other parts of the machine will not interfere with turning the crank thereon.

The nut B is rigidly secured to the bed of the machine in permanent adjustment. The nut B is revoluble in a suitable bearing formed in the bed of the machine and is secured therein in such manner as to provide for limited rotary movement thereof. As shown, the nut 13 is fitted to a bushing 13*, rigidly secured to the bed of the machine,

and said nut is secured to said bushing by means of bolts b which pass through circular slots formed in the flange of said nut and are threaded into said bushing, all in a familiar manner.

It is obvious that by means of the nut 13 the outer end of the table A may be raised and lowered relative to the inner or pivoted end thereof. Said nut thus affords convenient means for truin g up said table relatively to the spindle of the machine and to maintain it in such relation.

If for any reason considered desirable, my invention also contemplates making the nut B adjustable instead of the nut 13, or both of said nuts may be adjustable.

Pivoted one to each side of the table B, adjacent to the outer end thereof, are arms 0,

each of which is provided with a slot c,through which passes a binding-screw c, which is threaded into the side of the bed of the ma chine. As shown, the upper ends of the arms 0 are secured to the table B by means of studs 0 to the outer ends of which are threaded binding-nuts 0 To provide for the convenient removal of the arms 0, the studs 0 are provided with heads which engage T-slots 0 formed in the sides of the table, and the relation of parts is such that the tops of said arms will be below the topof the table. Said arms 0 will obviously operate to support the outer end of the table 13 independently of the screws 13 13, thus relieving said screws and insuring stiffness and rigidity to said table. In like manner the inner end of said table may besecured in adjusted position independently of said screws by means of a set-screw 0 which bears against the gib of the slide B and clamps it to the guide on the column A of the machine in the usual manner.

The bearing for the outer end of the boring-bar is formed in the upper endof a standard or column 0, which rests upon the bed of the machine and'is located beyond the outer end of the table 13.

WVith a machine constructed in the manner described it is obvious that the top of the 'table will be entirely unobstructed by the parts of the machine at all times.

As it relates to the improved thrust-bearing for the feed mechanism which is, as usual, in the rear of the main bearings of the head stock D of the machine, the novel feature of a machine embodying my invention consists in the manner of supporting said bearing. In my improved construction said thrustbearing is formed at the outer end of a rearward extension D of the head-stock D of the machine, which is preferably formed integral with said head-stock and which comprises webs or flanges d, which extend up on both sides of the spindle to about the middle thereof, so that the strain due to the feeding of the tool will be mainly sustained by metal disposed in a direct line with the direction of said strain, which is thus subjected to a tensile strain only. As heretofore stated, a further advantage of this construction is that said thrust-bearing may be bored with the main bearings of the head-stock, thus effecting a considerable economy.

I claim 1. In a horizontal drilling and boring machine, or the like, the combination of a slide, a table pivoted thereto and means for raising and lowering the ends of said table independently of each other,substantially as described.

2. In a horizontal drilling and boring machine, or the like, the combination of a slide, a table pivoted thereto, means for raising and lowering the ends of said table independently of each other and means for raising and lowering said table bodily, substantially as described. l

3. In a horizontal drilling and boring machine, or the like, the combination of a slide, a table one end of which is pivoted to said slide and means for adjusting said table pivotally, substantially as described.

4, In a horizontal drilling and boring machine, or the like, the combination of a slide, a table one end of which is pivoted to said slide, means for adjusting said table pivotally and means for raising and lowering said table and slide bodily, substantially as described. j

5. In a horizontal drilling and boring machine, or the like, the combination of a slide,

IIO

a table one end of which is pivoted to said slide, screws beneath said table, one adjacent to each end thereof, the upper ends of which are revolubly secured in said table and the lower ends of which are threaded to nuts secured in the bed of the machine, one or both of said nuts being adjustable and means to rotate said screws together to raise or lower the table bodily, substantially as described.

6. In a horizontal drilling and-boring machine, or the like, the combination of a slide, a table one end of which is pivoted to said slide, screws beneath said table, one adjacent to each end thereof, the upper ends of said screws being revolubly secured in said table and the lower ends thereof being threaded to nuts secured in the bed of the machine, one or both of said nuts being adjustable, a shaft carried in the table, gears on which engage with gears secured to said screws and means to rotate said shaft, substantially as described.

7. In a horizontal drilling and boring machine, or the like, the combination of aslide, a table one endof which is pivoted to said slide, screws beneath said table, one adjacent to each end thereof, the upper ends of said screws being revolubly secured in said table and the lower ends thereof being threaded to nuts secured in the bed of the machine, one or both of said nuts being revoluble'in bushings secured in the bed, binding-screws which pass through circular slots in said nuts and are threaded into said bushing or bushings, a shaft carried in the table, gears on which engage with gears secured to said shaft, substantially as described. 4

S. In a horizontal drilling and boring machine, or the like, the combination of a slide, a table one end of which is pivoted to said slide, screws beneath said table, one adja-.

cent to each end thereof, the upper ends of said screws being revolubly secured in said table and the lower ends thereof being threaded to nuts secured in the bed of the machine, gears secured to the upper ends of said screws which engage gears secured to a shaft carried in the table, means to rotate said shaft, openin gs in said table through which said gearing is accessible and caps to close said openings, substantially as described.

9. In a horizontal drilling and boring machine, or the like, the combination of a slide, a table connected thereto, screws beneath said table, one adjacent to each end thereof, the upper ends of said screws being revolubly secured in said table and the lower ends thereof being threaded to nuts secured in the bed, a longitudinal shaft carried in the table gears on which engage gears secured to said screws, a transverse shaft revolubly mounted in said table adjacent to the end thereof connected to the slide, a gear on said transverse shaft which engages the gear on the longitudinal shaft at the corresponding end of the table, the gear on said transverse shaft being small enough to clear the gear on the screw and means to rotate said transverse shaft, substantially as described.

10. In a horizontal drilling and boring machine, or the like, the combination of a slide, a table one end of which is pivoted to said slide, screws beneath said table, one adjacent to each end thereof, the upper ends of said screws being revolubly secured in said table and the lower ends thereof being threaded to nuts secured in the bed, a longitudinal shaft carried in the table gears on which engage gears secured to said screws, a transverse shaft revolubly mounted in said table adjacent to the pivoted end thereof and which projects at the side of the table, a gear thereon which engages the gear on the longitudinal shaft at the corresponding end of the table,

the gear on said transverse shaft being small enough to clear the gear on the screw and means to rotate said transverse shaft, substantially as described.

11. In a horizontal drilling and boring machine, the combination with the table of arms secured to the outer end thereof which do not extend above the top of said table and means to clamp the lower ends of said arms to the bed of the machine, substantially as described.

12. In a horizontal drilling and boring machine, or the like, the combination with the table of arms pivoted to each side thereof adjacent to its outer end, and in such position that they will not extend above the top of said table, slots formed in said arms through which pass binding-screws threaded into the bed of the machine, substantially as described.

13. In a horizontal drilling and boring ma chine, or the like, the combination with the table of arms pivoted thereto adjacent to its outer end, slots formed in said arms through which pass binding-screws threaded into the bed of the machine, and a bearing for the outer end of a boring-bar formed in a standard or column, which rests upon the bed beyond the end of the table, substantially as described.

14. A thrust-bearing for the feed mechanism of a horizontal drilling and boring machine, formed at the end of a rearward extension of the head-stock of said machine, said rearward extension of the head-stock bein g formed integral with said head-stock and comprising webs which extend up even with the middle of the spindle on both sides thereof in such manner that they will sustain a tensile strain from the operation of the feed mechanism, substantially as described.

15. In a horizontal drilling and boring machine, the combination of a bed of substantially uniform depth or thickness throughout itsentire length, a separate column rigidly secured to an extension formed around one end of the bed adjacent to the bottom thereof, the end of the bed being inclosed by said column and the front wall or side of the column being cut away to receive said bed, substantially as described.

In testimony that I claim the foregoing as my invention I hereunto set my hand this 21st day of December, 1896.

WALTER B. PEARSON.

Witnesses:

GEO; l-I. NARAMORE, W. F. RICHARDSON. 

